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Raspberry Pi 4 buying advice

Posted by zacster on August 27, 2020 at 18:56:28:
I'm looking to buy an RPi 4 to run Volumio for my E30 DAC. What do I really need? I already have a 3B+ up and running with this, and have many power supplies already.

I understand the 4 draws more current, and a 3amp supply is recommended, but do I really need yet another switching supply? I would rather it run off of battery in any case. My current setup runs all day on a single charge of my Anker 13000mah battery. Will the 4 + E30 DAC last on that. It doesn't have to be the whole day since I don't have it on that much, but an evening's worth of listening at least. I have two of these Ankers too so I could split the load but that would mean not having the extra for my phone.

The other question is heat. Do I need the fan and heatsinks that the kits come with? I'm just trying to limit the buy to what I need because I already have too many parts laying around for all of my hobbies that I don't use.

So, what should I get? The $99 kit or go a la carte and just get the pieces I need?